BOSTON (KRNV, MyNews4.com, NBC & CNN) -- Boston Police said Wednesday that three additional suspects have been taken into custody in connection with the Boston Marathon bombings April 15. Tamerlan and Dzhokhar Tsarnaev have been accused of carrying out the attack. Tamerlan died after a shootout with police, and Dzhokhar is in custody.

NBC's Pete Williams says the three arrested have been under FBI surveillance for about 10 days. The FBI says it is likely the three removed items from Tsarnaev's dorm room. NBC News sources say it is not 100-percent clear if the suspects had any knowledge or involvement in the bombing before it happened. Sources told NBC News the three are college roommates of accused bomber Dzokhar Tsarnaev. A source tells the Boston Globe that it appears three only helped Dzhokhar Tsarnaev after the bombing and they were already in custody on immigration violations.

A Department of Homeland security source with firsthand knowledge of the investigation told CNN two of the suspects were arrested on charges of making false statements and conspiracy to obstruct justice in the bombings case. A third student, a U.S. citizen, also had been arrested.

In a tweet Wednesday morning, the police department says only that three more suspects are in custody and more details will follow. A later tweet added there is no additional threat to the public. Boston Police spokeswoman Cheryl Fiandaca referred all questions to the FBI.

Three people were killed and more than 260 injured on April 15 when two bombs exploded near the finish line.

Both are Russian natives who lived for several years in the U.S. They are accused of using a weapon of mass destruction.

(MGNOnline.com)

BOSTON (KRNV, MyNews4.com & CNN) - It was announced earlier this week that acquaintances of Dzhokhar Tsarnaev were being held by authorities. The Boston Globe is now report two of the people arrested in Marathon probe are already in custody for immigration violations.

Attorney Robert Stahl, told CNN that his client, Dias Kadyrbayev, and a fellow Kazakh student, Azamat Tazhayakov, are being held strictly on immigration violations and had nothing to do with the explosions on April 15.

Stahl say the two were questioned for about 10 hours by FBI agents on April 19, just hours before Tsarnaev surrendered to authorities after he was found hiding in a boat in Watertown, Massachusetts.

They were released after the questioning but were taken into custody a day later. Stahl told CNN they are being held at the Suffolk County House of Corrections under the supervision of U.S. Immigration and Customs Enforcement.

Immigration law requires that students "regularly attend" classes to keep their visa status current, Stahl said, but Kadyrbayev "had not been attending classes."

In such cases, school authorities inform the immigration agency, Stahl said

Kadyrbayev befriended Tsarnaev, Stahl said, because "he had been in the U.S. for a long time, spoke English well and knew the ropes." The attorney confirmed that the two Kazakh students were alongside Tsarnaev in photograph taken in New York City's Times Square in 2012.

Federal law enforcement sources told CNN that agents "went in heavy" -- prepared for resistance -- on April 19 when they went to the off-campus apartment the two Kazakh students shared because authorities believed Tsarnaev might have been staying there.

Another source who did not want his identity disclosed told CNN that the Kazakh students and two other students at the University of Massachusetts Dartmouth shared a cellphone plan.

"They all wanted to buy an iPhone 5," the source said, "but none of them could afford it on their own. So they shared a plan."

Federal law enforcement sources told CNN that the two Kazakh students were being detained "in an abundance of caution" because authorities want detailed information on the movements of Dzhokhar Tsarnaev and his brother, Tamerlan, in the weeks and days before the bombs went off near the Boston Marathon finish line.

Stahl said he did not know how long his client would remain in detention.

"That is a developing situation," he told CNN. "We will be dealing with that through the courts."